| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-56708: EDAC/igen6: Avoid segmentation fault on module unload |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| EDAC/igen6: Avoid segmentation fault on module unload |
| |
| The segmentation fault happens because: |
| |
| During modprobe: |
| 1. In igen6_probe(), igen6_pvt will be allocated with kzalloc() |
| 2. In igen6_register_mci(), mci->pvt_info will point to |
| &igen6_pvt->imc[mc] |
| |
| During rmmod: |
| 1. In mci_release() in edac_mc.c, it will kfree(mci->pvt_info) |
| 2. In igen6_remove(), it will kfree(igen6_pvt); |
| |
| Fix this issue by setting mci->pvt_info to NULL to avoid the double |
| kfree. |
| |
| The Linux kernel CVE team has assigned CVE-2024-56708 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.11 with commit 10590a9d4f23e0a519730d79d39331df60ad2079 and fixed in 5.15.174 with commit 029ac07bb92d2f7502d47a4916f197a8445d83bf |
| Issue introduced in 5.11 with commit 10590a9d4f23e0a519730d79d39331df60ad2079 and fixed in 6.1.120 with commit 2a80e710bbc088a2511c159ee4d910456c5f0832 |
| Issue introduced in 5.11 with commit 10590a9d4f23e0a519730d79d39331df60ad2079 and fixed in 6.6.64 with commit 830cabb61113d92a425dd3038ccedbdfb3c8d079 |
| Issue introduced in 5.11 with commit 10590a9d4f23e0a519730d79d39331df60ad2079 and fixed in 6.11.11 with commit e5c7052664b61f9e2f896702d20552707d0ef60a |
| Issue introduced in 5.11 with commit 10590a9d4f23e0a519730d79d39331df60ad2079 and fixed in 6.12.2 with commit db60326f2c47b079e36785ace621eb3002db2088 |
| Issue introduced in 5.11 with commit 10590a9d4f23e0a519730d79d39331df60ad2079 and fixed in 6.13 with commit fefaae90398d38a1100ccd73b46ab55ff4610fba |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-56708 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/edac/igen6_edac.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/029ac07bb92d2f7502d47a4916f197a8445d83bf |
| https://git.kernel.org/stable/c/2a80e710bbc088a2511c159ee4d910456c5f0832 |
| https://git.kernel.org/stable/c/830cabb61113d92a425dd3038ccedbdfb3c8d079 |
| https://git.kernel.org/stable/c/e5c7052664b61f9e2f896702d20552707d0ef60a |
| https://git.kernel.org/stable/c/db60326f2c47b079e36785ace621eb3002db2088 |
| https://git.kernel.org/stable/c/fefaae90398d38a1100ccd73b46ab55ff4610fba |
